:root {
  color-scheme: light;
  --public-ink: #17211c;
  --public-muted: #5e6962;
  --public-paper: #f6f7f2;
  --public-surface: #ffffff;
  --public-line: #dce2dc;
  --public-green: #145f43;
  --public-green-dark: #0d422e;
  --public-mint: #dff5e8;
  --public-warm: #fff1d8;
  --public-red: #9d342d;
  --public-shadow: 0 18px 55px rgba(30, 54, 42, 0.1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--public-paper);
  color: var(--public-ink);
  font-family: Nunito, "Noto Sans SC", "Noto Sans JP", "Noto Sans KR", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

.public-skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 20;
  padding: 0.6rem 0.9rem;
  border-radius: 0.65rem;
  background: var(--public-ink);
  color: white;
  transform: translateY(-180%);
}

.public-skip-link:focus {
  transform: translateY(0);
}

.public-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 2rem;
  min-height: 76px;
  padding: 0.75rem max(1.25rem, calc((100vw - 1180px) / 2));
  border-bottom: 1px solid rgba(220, 226, 220, 0.85);
  background: rgba(246, 247, 242, 0.92);
  backdrop-filter: blur(18px);
}

.public-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--public-ink);
  font-size: 1.2rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  text-decoration: none;
}

.public-brand span {
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  border-radius: 0.65rem;
  background: var(--public-ink);
  color: white;
  font-size: 1rem;
}

.public-nav {
  display: flex;
  justify-content: center;
  gap: clamp(1rem, 3vw, 2.2rem);
}

.public-nav a,
.public-footer nav a {
  color: var(--public-muted);
  font-size: 0.92rem;
  font-weight: 750;
  text-decoration: none;
}

.public-nav a:hover,
.public-footer nav a:hover,
.public-text-link:hover {
  color: var(--public-green);
}

.public-main {
  width: min(1120px, calc(100% - 2.5rem));
  margin: 0 auto;
}

.public-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding-top: 1.6rem;
  overflow: hidden;
  color: var(--public-muted);
  font-size: 0.84rem;
  white-space: nowrap;
}

.public-breadcrumb a {
  color: var(--public-green);
  font-weight: 800;
}

.public-breadcrumb span:last-child {
  overflow: hidden;
  text-overflow: ellipsis;
}

.public-hero {
  position: relative;
  padding: clamp(4.8rem, 11vw, 8.5rem) 0 clamp(4rem, 8vw, 6.5rem);
}

.public-hero::after {
  position: absolute;
  top: 14%;
  right: 2%;
  z-index: -1;
  width: min(31vw, 350px);
  aspect-ratio: 1;
  border-radius: 42% 58% 65% 35% / 45% 42% 58% 55%;
  background: linear-gradient(145deg, var(--public-mint), var(--public-warm));
  content: "";
  filter: blur(1px);
  opacity: 0.88;
  transform: rotate(8deg);
}

.public-eyebrow,
.public-kicker {
  margin: 0 0 0.85rem;
  color: var(--public-green);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  line-height: 1.4;
  text-transform: uppercase;
}

.public-hero h1 {
  max-width: 850px;
  margin: 0;
  font-size: clamp(2.7rem, 7vw, 5.6rem);
  font-weight: 900;
  letter-spacing: -0.065em;
  line-height: 0.98;
  text-wrap: balance;
}

.public-hero-copy {
  max-width: 720px;
  margin: 1.7rem 0 0;
  color: #455249;
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  line-height: 1.65;
}

.public-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.2rem;
  margin-top: 2.2rem;
}

.public-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0.75rem 1.25rem;
  border: 1px solid var(--public-green-dark);
  border-radius: 0.9rem;
  background: var(--public-green-dark);
  box-shadow: 0 8px 22px rgba(13, 66, 46, 0.16);
  color: white;
  font-size: 0.94rem;
  font-weight: 900;
  line-height: 1.2;
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.public-button:hover {
  background: var(--public-green);
  box-shadow: 0 11px 28px rgba(13, 66, 46, 0.22);
  transform: translateY(-2px);
}

.public-button:focus-visible,
.public-text-link:focus-visible,
.public-nav a:focus-visible,
.public-card-link:focus-visible {
  outline: 3px solid #efb343;
  outline-offset: 4px;
}

.public-button-small {
  min-height: 42px;
  padding: 0.6rem 1rem;
  border-radius: 0.75rem;
}

.public-text-link {
  color: var(--public-green-dark);
  font-weight: 900;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
}

.public-section,
.public-related {
  margin-bottom: clamp(4rem, 9vw, 7rem);
}

.public-split {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.2rem;
}

.public-split > div {
  padding: clamp(1.6rem, 4vw, 2.7rem);
  border: 1px solid var(--public-line);
  border-radius: 1.5rem;
  background: var(--public-surface);
  box-shadow: var(--public-shadow);
}

.public-section h2,
.public-related h2,
.public-cta h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.65rem, 3.4vw, 2.5rem);
  letter-spacing: -0.045em;
  line-height: 1.12;
  text-wrap: balance;
}

.public-section p,
.public-cta p {
  color: var(--public-muted);
}

.public-section-heading {
  max-width: 700px;
  margin-bottom: 1.65rem;
}

.public-feature-grid,
.public-card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.public-feature-grid li {
  position: relative;
  min-height: 88px;
  padding: 1.25rem 1.25rem 1.25rem 3.1rem;
  border: 1px solid var(--public-line);
  border-radius: 1.2rem;
  background: var(--public-surface);
  font-weight: 850;
}

.public-feature-grid li::before {
  position: absolute;
  top: 1.25rem;
  left: 1.25rem;
  display: grid;
  width: 1.25rem;
  height: 1.25rem;
  place-items: center;
  border-radius: 50%;
  background: var(--public-mint);
  color: var(--public-green-dark);
  content: "✓";
  font-size: 0.76rem;
}

.public-reading {
  max-width: 820px;
  margin-right: auto;
  margin-left: auto;
  padding: clamp(1.5rem, 5vw, 3.5rem);
  border: 1px solid var(--public-line);
  border-radius: 1.6rem;
  background: var(--public-surface);
  box-shadow: var(--public-shadow);
}

.public-reading h2 {
  margin-top: 2.4rem;
  font-size: clamp(1.45rem, 3vw, 2rem);
}

.public-reading h2:first-of-type {
  margin-top: 1.7rem;
}

.public-lead {
  margin-top: 0;
  color: var(--public-ink) !important;
  font-size: 1.17rem;
  font-weight: 700;
}

.public-correction-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.public-example {
  padding: 1.2rem;
  border: 1px solid var(--public-line);
  border-radius: 1rem;
  background: #f9faf7;
}

.public-example span {
  color: var(--public-muted);
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.public-example p {
  margin: 0.45rem 0 0;
  color: var(--public-ink);
  font-weight: 800;
}

.public-example-wrong {
  border-color: #ead3cf;
}

.public-example-wrong span {
  color: var(--public-red);
}

.public-example-right {
  border-color: #b9dec9;
  background: #f0faf4;
}

.public-example-right span {
  color: var(--public-green);
}

.public-example-list {
  display: grid;
  gap: 0.7rem;
  padding-left: 1.3rem;
}

.public-example-list li::marker {
  color: var(--public-green);
}

.public-chinese {
  margin-top: 2rem;
  padding: 1.3rem 1.45rem;
  border-left: 4px solid #dc9b32;
  border-radius: 0 1rem 1rem 0;
  background: var(--public-warm);
}

.public-chinese strong {
  display: block;
  margin-bottom: 0.3rem;
}

.public-chinese p {
  margin: 0;
  color: #594a31;
}

.public-effective {
  display: inline-block;
  margin: 0 0 0.75rem;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  background: var(--public-mint);
  color: var(--public-green-dark) !important;
  font-size: 0.82rem;
  font-weight: 850;
}

.public-legal a {
  color: var(--public-green);
  font-weight: 800;
}

.public-card-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.public-card {
  display: flex;
  min-height: 185px;
  flex-direction: column;
  justify-content: space-between;
  padding: 1.35rem;
  border: 1px solid var(--public-line);
  border-radius: 1.25rem;
  background: var(--public-surface);
  box-shadow: 0 10px 35px rgba(30, 54, 42, 0.06);
  text-decoration: none;
  transition: border-color 160ms ease, transform 160ms ease;
}

.public-card:hover {
  border-color: #9bc6ad;
  transform: translateY(-3px);
}

.public-card span {
  font-size: 1.08rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.public-card small {
  margin-top: 1rem;
  color: var(--public-muted);
  font-size: 0.82rem;
  line-height: 1.5;
}

.public-cta {
  margin: clamp(4rem, 9vw, 7rem) 0;
  padding: clamp(2rem, 7vw, 4.5rem);
  border-radius: 1.8rem;
  background: var(--public-green-dark);
  box-shadow: 0 24px 60px rgba(13, 66, 46, 0.2);
  color: white;
}

.public-cta .public-kicker,
.public-cta p {
  color: #c9e8d5;
}

.public-cta p {
  max-width: 650px;
}

.public-button-light {
  margin-top: 1rem;
  border-color: white;
  background: white;
  box-shadow: none;
  color: var(--public-green-dark);
}

.public-button-light:hover {
  background: var(--public-mint);
  color: var(--public-green-dark);
}

.public-footer {
  display: grid;
  grid-template-columns: 1.3fr repeat(3, 1fr);
  gap: 2.5rem;
  margin-top: 7rem;
  padding: 3.5rem max(1.25rem, calc((100vw - 1180px) / 2));
  border-top: 1px solid var(--public-line);
  background: #edf0e9;
}

.public-brand-footer {
  margin-bottom: 0.7rem;
}

.public-footer p {
  margin: 0;
  color: var(--public-muted);
  font-size: 0.9rem;
}

.public-footer nav {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.public-footer nav strong {
  margin-bottom: 0.25rem;
  font-size: 0.88rem;
}

@media (max-width: 780px) {
  .public-header {
    grid-template-columns: 1fr auto;
    gap: 1rem;
    min-height: 68px;
  }

  .public-nav {
    display: none;
  }

  .public-hero::after {
    top: 8%;
    right: -5%;
    width: 48vw;
    opacity: 0.55;
  }

  .public-split,
  .public-feature-grid,
  .public-correction-grid,
  .public-card-grid {
    grid-template-columns: 1fr;
  }

  .public-card {
    min-height: 145px;
  }

  .public-footer {
    grid-template-columns: repeat(2, 1fr);
  }

  .public-footer > div {
    grid-column: 1 / -1;
  }
}

@media (max-width: 480px) {
  body {
    font-size: 16px;
  }

  .public-main {
    width: min(100% - 1.5rem, 1120px);
  }

  .public-header {
    padding-right: 0.75rem;
    padding-left: 0.75rem;
  }

  .public-header .public-button-small {
    min-height: 40px;
    padding: 0.55rem 0.75rem;
    font-size: 0.82rem;
  }

  .public-reading {
    padding: 1.2rem;
    border-radius: 1.15rem;
  }

  .public-footer {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --public-ink: #eef5ef;
    --public-muted: #aebbb2;
    --public-paper: #101713;
    --public-surface: #18211c;
    --public-line: #344239;
    --public-green: #75d7a2;
    --public-green-dark: #256b4a;
    --public-mint: #183c2a;
    --public-warm: #44351d;
    --public-red: #ef9992;
    --public-shadow: 0 18px 55px rgba(0, 0, 0, 0.26);
  }

  .public-header {
    background: rgba(16, 23, 19, 0.92);
  }

  .public-hero-copy {
    color: #c5d0c8;
  }

  .public-example {
    background: #151d18;
  }

  .public-example-right {
    background: #163523;
  }

  .public-chinese p {
    color: #f1dba9;
  }

  .public-footer {
    background: #121b16;
  }
}